[gitflow-maven-plugin] Update versions for release 3.3.0

Author: stefanseifert

pom.xml

@@ -31,7 +31,7 @@ under the License.
 
   <groupId>io.wcm.devops.maven.plugins</groupId>
   <artifactId>eclipse-maven-plugin</artifactId>
-  <version>3.2.1-SNAPSHOT</version>
+  <version>3.3.0</version>
   <packaging>maven-plugin</packaging>
 
   <name>wcm.io DevOps Eclipse Maven Plugin</name>